//
// Created by 小演员的MacBook on 2024/7/16.
//

#include <iostream>

class Base {
public:
    int a;
};
class Derived : public Base {};
class Derived2 : public Base {};
class Derived3 : public Derived, public Derived2 {};
int main() {
    std::cout << "Hello, World!" << std::endl;
    return 0;
}